2008 Stumpy fork and shock advice

I just installed a rp23 and love it. Now I'm thinking of upgrading to a 140mm fork. Any advice on this? Looking at either a Fox vanilla or Rock Shox revelation. Would you guys recommend an adjustable travel fork or fixed 140mm? I'm not thinking anything less than 120mm would be used anyway since I have installed the rp23.
What are your thoughts on a coil fork from Rock Shox? I want a fork that has good small bump sensitivity, yet also plush feel. Would like to keep weight low also.